Which technique can detect 20 inborn errors of metabolism from a single blood spot?

Which technique can detect 20 inborn errors of metabolism from a single blood spot?

• A. Mass Spectrometry
• B. Capillary Electrophoresis
• C. High Performance Liquid Chromatography (HPLC)
• D. Tandem Mass Spectrometry

Answer: (D)

Tandem mass spectrometry enables multiplex screening from a single dried blood spot. In newborn screening, a small blood sample is spotted on filter paper and analyzed for a panel of metabolites, mainly amino acids and acylcarnitines. The tandem MS setup uses two mass-analysis steps: the first selects a specific precursor ion corresponding to a metabolite, and the second analyzes the fragment ions produced from that precursor. This two-step process provides both precise identification and quantitative data for many different metabolites in one run, allowing clinicians to detect patterns that indicate about 20 different inborn metabolic disorders from one blood spot. The method is highly sensitive, specific, and efficient for high-throughput screening, which is why it’s preferred over single-stage mass spectrometry, HPLC, or capillary electrophoresis for this purpose.

Tandem mass spectrometry enables multiplex screening from a single dried blood spot. In newborn screening, a small blood sample is spotted on filter paper and analyzed for a panel of metabolites, mainly amino acids and acylcarnitines. The tandem MS setup uses two mass-analysis steps: the first selects a specific precursor ion corresponding to a metabolite, and the second analyzes the fragment ions produced from that precursor. This two-step process provides both precise identification and quantitative data for many different metabolites in one run, allowing clinicians to detect patterns that indicate about 20 different inborn metabolic disorders from one blood spot. The method is highly sensitive, specific, and efficient for high-throughput screening, which is why it’s preferred over single-stage mass spectrometry, HPLC, or capillary electrophoresis for this purpose.